Hey y'all,
I tightened up the tensioner and replaced the water pump last week, and now I've got this metal scraping noise in my engine. Real bad when I start up, and sometimes shows up again at stoplights. S Belt?

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On a cold engine, remove the belt and start the car. If the noise is gone, it's either the belt or tensioner. You can run the car for a minute or so with the belt off, but probably won't need more than a few seconds.

Some of the aftermarket tensioners have slightly different diameter pulleys and require a slightly shorter belt. You can measure yours - I think the stock size has been posted somewhere here